Talend MDM and virtual MDM

Talend MDM and virtual MDM

Hi,How Talend MDM can be used to implement virtual MDM system?What I call 'virtual MDM' is a system which does not physically stores the data in a unique MDM hub but which only manages the keys of the objects to find their locations in the different databases.How can we set up data quality and governance rules in this case?Thank you by advance.